How to draw a histogram

At some point in your study or field work, you may develop a need to represent data through different graphical methods. For this reason, it is helpful to get acquainted with different graphical methods for ease of data analysis and presentation. A histogram is one such beneficial method for its accuracy in outlining statistical data distribution. A histogram shows the frequency of event occurrences within a specified period and takes after the bar chart. Cases in point of continuous data presented in a histogram include temperature readings, time, volume, and size among other measurements. Unlike the bar chart, a histogram represents the frequency of a group of numbers by the area under the graph. Learning how to draw a histogram is not only handy for students but also professionals interested to represent project statistical findings.

The process of drawing a histogram should not be complicated if you carefully follow our steps and guide. What is important to note is that a histogram can only be used to represent a continuous set of data bringing out the element of frequency. So how do I draw a histogram? Well, our histogram drawing guide shares helpful information that is necessary when it is expected to present data on a histogram. Before we embark on how to draw a histogram for grouped data, we need to highlight a couple of tips.

Before drawing the histogram, it is important to determine the class boundaries and class width. The class boundaries denote numbers used to separate different classes. The gap margin between classes is the difference between the upper-class limit of one class and the lower class limit of the next class.

The best way to draw a histogram

On the vertical axis, place frequencies by labeling it Frequency.

On the horizontal axis, place the lower value of each interval. Label this axis the type of data to be shown.

Draw a bar extending from the lower value of each interval to the lower value of the next interval. The height of each bar should be equal to the frequency of its corresponding range.

How to draw a histogram fast

Draw a horizontal line to represent the classes.

Place evenly spaced marks along this line to correspond to the classes.

Label the marks and assign a name to the horizontal axis.

Draw a vertical line to the left of the lowest class.

Choose a scale for the vertical axis that will allow the class with the highest frequency.

Label the marks to clarify the scale and assign a name to the vertical axis.

Construct bars for each class. The height of each bar should correspond to the frequency of the class at the base of the bar.

How to draw a histogram by hand

Knowing how to draw a histogram by hand is essential and involves the following steps:

1. Using a ruler, draw out the primary axes.

2. Measure out the groups.

3. Measure out the vertical axis.

4. Draw the bars.

5. Add some colors using colored pencils or markers.

How to draw a histogram in excel

Drawing a histogram in excel involves the following steps.

1. Fill out your data in an opened excel document. Fill the first column with the frequency of the results and the second column with the data groups.

2. Carry out data analysis by first clicking on tools

3. Select the histogram option in the data analysis menu and click OK.

4. Adjust your input and bin ranges by selecting specific columns.

5. Select chart output and then press OK.

6. Finalise by saving the chart.

How to draw a histogram from a frequency table

The frequency table consists of collected data values arranged in ascending order corresponding with their frequencies. The frequency table helps you to see the trend in a set of data quickly.

Drawing a histogram from a frequency table involves the following steps.

1. Choose a range covering all the data then divide the array into equal intervals or groupings.

2. Record tally marks

3. Use the information from the frequency table to draw the histogram.

Histogram example problems

Master how to make a histogram from a frequency table below showing the ages of 25 children on a school bus and associated histogram setbacks:

Age- Frequency

5-10 - 6

11-15 - 15

16-17 - 4

>17 - 0

From the data provided above, we can deduce that the class boundaries are 4, 11, 16 and 18. Class widths are 6, 5 and 12. Areas for the bar should be 6, 15 and 14.

Histogram statistics and sample histogram diagram

In statistics, the histogram is an excellent way of visually summarizing quantitative observations.